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›› 2010, Vol. 27 ›› Issue (2): 176-183.DOI: 10.7523/j.issn.2095-6134.2010.2.005

• Research Articles • Previous Articles     Next Articles

Small-scale spatial distribution of heavy metals in urban topsoil: A case study in a small area near Shougang group

CHEN Xiao-Chen, CUI Yan-Shan   

  1. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-11-11 Revised:2009-12-07 Online:2010-03-15

Abstract:

The given study was carried out in a small urban area near Shougang group. Sixty-five topsoil samples were collected and the concentrations of Cd, Cu, Pb, Cr, Zn, Ni, Mn, and Fe were analyzed. The results of descriptive statistics indicate that anthropic activities greatly influenced the concentrations of Cd, Pb, Zn and Cu. The pollution problems of Cd, Cu, and Zn have occurred, and the worst case was found in Cd. Principal component analysis and correlation analysis were applied and geostatistical analysis assisted with GIS tool was conducted. The results showed that eight metals could be grouped into three principal components (PCs) with moderate spatial autocorrelation. PC1 includes Cd, Cu, Pb, Cr, and Zn, which are related to traffic and vehicles. PC2 includes Cr, Mn, and Fe, which mainly come from the Shougang group. PC3 includes only Ni, which comes from pedogenic material. In general, the heavy metal pollution problems in the studied area could be attributed to traffic and vehicles to a large extent. Due attention should be paid to the subsequent environmental damage and potential human health risk. The present study plays a guiding role in the soil pollution risk assessment and the land use planning for this area.

Key words: small-scale, urban topsoil, heavy metal, spatial distribution, Shougang group

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